Zobrazeno 1 - 10
of 271
pro vyhledávání: '"U. Merkel"'
Publikováno v:
Climate of the Past, Vol 18, Pp 1997-2019 (2022)
Three time-slice carbon cycle simulations for the last glacial maximum (LGM) constrained by the CO2 concentration in the atmosphere and the increase in the mean concentration of dissolved inorganic carbon in the deep ocean were carried out with a ful
Externí odkaz:
https://doaj.org/article/f8f30ac178754388ba6a25c819762905
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 825-840 (2020)
We developed a coupling scheme for the Community Earth System Model version 1.2 (CESM1.2) and the Model of Early Diagenesis in the Upper Sediment of Adjustable complexity (MEDUSA), and explored the effects of the coupling on solid components in the u
Externí odkaz:
https://doaj.org/article/73871f75dc624a159c26f264ab1dba68
Publikováno v:
Climate of the Past, Vol 16, Pp 371-386 (2020)
Climate change in Siberia is currently receiving a lot of attention because large permafrost-covered areas could provide a strong positive feedback to global warming through the release of carbon that has been sequestered there on glacial–interglac
Externí odkaz:
https://doaj.org/article/e7b254ec178843c9a2ac7a53d50b43f2
Autor:
C. V. Guerreiro, K.-H. Baumann, G.-J. A. Brummer, G. Fischer, L. F. Korte, U. Merkel, C. Sá, H. de Stigter, J.-B. W. Stuut
Publikováno v:
Biogeosciences, Vol 14, Pp 4577-4599 (2017)
Coccolithophores are calcifying phytoplankton and major contributors to both the organic and inorganic oceanic carbon pumps. Their export fluxes, species composition, and seasonal patterns were determined in two sediment trap moorings (M4 at 12°
Externí odkaz:
https://doaj.org/article/65205bc9c9064078a7e98f1d2eee6a94
Autor:
G. Fischer, O. Romero, U. Merkel, B. Donner, M. Iversen, N. Nowald, V. Ratmeyer, G. Ruhland, M. Klann, G. Wefer
Publikováno v:
Biogeosciences, Vol 13, Iss 10, Pp 3071-3090 (2016)
A more than two-decadal sediment trap record from the Eastern Boundary Upwelling Ecosystem (EBUE) off Cape Blanc, Mauritania, is analysed with respect to deep ocean mass fluxes, flux components and their variability on seasonal to decadal timescales.
Externí odkaz:
https://doaj.org/article/e97bccce24134c6ea200e03406fd68ad
Publikováno v:
Climate of the Past, Vol 9, Iss 4, Pp 1683-1696 (2013)
We investigated changes in tropical climate and vegetation cover associated with abrupt climate change during Heinrich Event 1 (HE1, ca. 17.5 ka BP) using two different global climate models: the University of Victoria Earth System-Climate Model (UVi
Externí odkaz:
https://doaj.org/article/88d6b23204724fb5b04b2c5d3405a305
Autor:
M. Kageyama, U. Merkel, B. Otto-Bliesner, M. Prange, A. Abe-Ouchi, G. Lohmann, R. Ohgaito, D. M. Roche, J. Singarayer, D. Swingedouw, X Zhang
Publikováno v:
Climate of the Past, Vol 9, Iss 2, Pp 935-953 (2013)
Fresh water hosing simulations, in which a fresh water flux is imposed in the North Atlantic to force fluctuations of the Atlantic Meridional Overturning Circulation, have been routinely performed, first to study the climatic signature of different s
Externí odkaz:
https://doaj.org/article/5f68923a22bd42d3be119ec070b149e6
Publikováno v:
Climate of the Past, Vol 9, Iss 2, Pp 789-809 (2013)
To understand the validity of δ18O proxy records as indicators of past temperature change, a series of experiments was conducted using an atmospheric general circulation model fitted with water isotope tracers (Community Atmosphere Model version 3.0
Externí odkaz:
https://doaj.org/article/145f45a2cea7447aa8ab74f1778d1131
Publikováno v:
Climate of the Past, Vol 8, Iss 2, Pp 841-853 (2012)
To address the connection between tropical African vegetation development and high-latitude climate change we present a high-resolution pollen record from ODP Site 1078 (off Angola) covering the period 50–10 ka BP. Although several tropical African
Externí odkaz:
https://doaj.org/article/32b235eaa2f74ae1a6edc1eba4899e9c
Autor:
V. Varma, M. Prange, U. Merkel, T. Kleinen, G. Lohmann, M. Pfeiffer, H. Renssen, A. Wagner, S. Wagner, M. Schulz
Publikováno v:
Climate of the Past, Vol 8, Iss 2, Pp 391-402 (2012)
The Southern Hemisphere Westerly Winds (SWW) have been suggested to exert a critical influence on global climate through the wind-driven upwelling of deep water in the Southern Ocean and the potentially resulting atmospheric CO2 variations. The inves
Externí odkaz:
https://doaj.org/article/70b3294250d14bff919f0ce87cb349aa